1. To churn or agitate something into a state of turbulence: The storm whipped up the sea, endangering the ships. The wind whipped the fire up so that it raged out of control. The car whipped up the leaves along the road.
2. To cause something to form by churning or agitating: The storm whipped up massive waves in the normally calm sea. The hurricane whipped several tornados up in its wake.
3. To rouse the emotions of some group of people; excite some group of people: The candidate whipped up the mob with talk of reform. The finale whipped the audience up into a frenzy.